var backImage = new Array();
backImage[0] = "img/bg1.gif";
backImage[1] = "img/04original.jpg";
backImage[2] = "img/02original.gif";
backImage[3] = "img/06original.jpg";
backImage[4] = "img/35original.gif";
var i;
for(i in backImage)
{
imgPath  = backImage[i];
backImage[i] = new Image;
backImage[i].src = imgPath;
}
function changeBGImage(whichImage){
if (document.body){
document.body.background = backImage[whichImage].src;
setCookie('bgnum',whichImage);
}
}
function setBGDefault(){
var defBG = getCookie('bgnum');
if (defBG != null) {
changeBGImage(defBG);
} else {
changeBGImage(0);
}
return true;
}
function setCookie(name, value, expires, path, domain, secure)
{
    document.cookie= name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}
function getCookie(name)
{
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1)
    {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    }
    else
    {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1)
    {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}
function deleteCookie(name, path, domain)
{
    if (getCookie(name))
    {
        document.cookie = name + "=" + 
            ((path) ? "; path=" + path : "") +
            ((domain) ? "; domain=" + domain : "") +
            "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}